Answer:
D, 'cus Heterotrophs can't make their own food like plants or humans, and Autotrophs can make their own food. For example plants, or in this case bacteria
The answers i got are in blue, if one value of x has more than one value of y it is not a function, otherwise it is
Animals use the respiratory system to breathe in oxygen and other gases and expel gases like CO2, right? O2 in, CO2 out.
I know this answer but it is really commutated
